Back scratcher



FIG. 1 is a perspective view of a back scratcher embodying my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a side view thereof, the opposite side view being identical thereto. 

The ornamental design for a back scratcher, as shown and described. 